@@ -520,6 +520,9 @@ int omap2_clk_enable_autoidle_all(void)
list_for_each_entry(c, &clk_hw_omap_clocks, node)
if (c->ops && c->ops->allow_idle)
c->ops->allow_idle(c);
+
+ of_ti_clk_allow_autoidle_all();
+
return 0;
}
@@ -539,6 +542,9 @@ int omap2_clk_disable_autoidle_all(void)
list_for_each_entry(c, &clk_hw_omap_clocks, node)
if (c->ops && c->ops->deny_idle)
c->ops->deny_idle(c);
+
+ of_ti_clk_deny_autoidle_all();
+
return 0;
}
@@ -1,3 +1,3 @@
ifneq ($(CONFIG_OF),)
-obj-y += clk.o dpll.o
+obj-y += clk.o dpll.o autoidle.o
endif
new file mode 100644
@@ -0,0 +1,107 @@
+/*
+ * TI clock autoidle support
+ *
+ * Copyright (C) 2013 Texas Instruments, Inc.
+ *
+ * Tero Kristo <t-kristo@ti.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed "as is" WITHOUT ANY WARRANTY of any
+ * kind, whether express or implied; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/clk-provider.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/clk/ti.h>
+
+struct clk_ti_autoidle {
+ void __iomem *reg;
+ u8 shift;
+ u8 flags;
+ const char *name;
+ struct list_head node;
+};
+
+#define AUTOIDLE_LOW 0x1
+
+static LIST_HEAD(autoidle_clks);
+
+static void ti_allow_autoidle(struct clk_ti_autoidle *clk)
+{
+ u32 val;
+
+ val = readl(clk->reg);
+
+ if (clk->flags & AUTOIDLE_LOW)
+ val &= ~(1 << clk->shift);
+ else
+ val |= (1 << clk->shift);
+
+ writel(val, clk->reg);
+}
+
+static void ti_deny_autoidle(struct clk_ti_autoidle *clk)
+{
+ u32 val;
+
+ val = readl(clk->reg);
+
+ if (clk->flags & AUTOIDLE_LOW)
+ val |= (1 << clk->shift);
+ else
+ val &= ~(1 << clk->shift);
+
+ writel(val, clk->reg);
+}
+
+void of_ti_clk_allow_autoidle_all(void)
+{
+ struct clk_ti_autoidle *c;
+
+ list_for_each_entry(c, &autoidle_clks, node)
+ ti_allow_autoidle(c);
+}
+
+void of_ti_clk_deny_autoidle_all(void)
+{
+ struct clk_ti_autoidle *c;
+
+ list_for_each_entry(c, &autoidle_clks, node)
+ ti_deny_autoidle(c);
+}
+
+void __init of_ti_autoidle_setup(struct device_node *node)
+{
+ u32 shift;
+ void __iomem *reg;
+ struct clk_ti_autoidle *clk;
+
+ if (of_property_read_u32(node, "ti,autoidle-shift", &shift))
+ return;
+
+ reg = of_iomap(node, 0);
+
+ clk = kzalloc(sizeof(*clk), GFP_KERNEL);
+
+ if (!clk) {
+ pr_err("%s: kzalloc failed\n", __func__);
+ return;
+ }
+
+ clk->shift = shift;
+ clk->name = node->name;
+ clk->reg = reg;
+
+ if (of_property_read_bool(node, "ti,autoidle-low"))
+ clk->flags |= AUTOIDLE_LOW;
+
+ list_add(&clk->node, &autoidle_clks);
+}
@@ -180,6 +180,15 @@ int omap3_dpll4_set_rate(struct clk_hw *clk, unsigned long rate,
unsigned long parent_rate);
void ti_dt_clocks_register(struct ti_dt_clk *oclks);
+void of_ti_autoidle_setup(struct device_node *node);
+
+#ifdef CONFIG_OF
+void of_ti_clk_allow_autoidle_all(void);
+void of_ti_clk_deny_autoidle_all(void);
+#else
+static inline void of_ti_clk_allow_autoidle_all(void) { }
+static inline void of_ti_clk_deny_autoidle_all(void) { }
+#endif
extern const struct clk_hw_omap_ops clkhwops_omap3_dpll;
extern const struct clk_hw_omap_ops clkhwops_omap4_dpllmx;